Steven Liu:
> Fixes: null pointer dereference
>
> Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
> Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
> ---
> libavcodec/vp6.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
> index d024370793..7ddabbff80 100644
> --- a/libavcodec/vp6.c
> +++ b/libavcodec/vp6.c
> @@ -653,6 +653,8 @@ static av_cold int vp6_decode_init(AVCodecContext *avctx)
>
> if (s->has_alpha) {
> s->alpha_context = av_mallocz(sizeof(VP56Context));
> + if (!s->alpha_context)
> + return AVERROR(ENOMEM);
> ff_vp56_init_context(avctx, s->alpha_context,
> s->flip == -1, s->has_alpha);
> ff_vp6dsp_init(&s->alpha_context->vp56dsp);
Already fixed by
https://ffmpeg.org/pipermail/ffmpeg-devel/2022-February/292714.html
(pushed as c4d63dbc9417ddf77f6e33f6144b23da7e97cb3b). Furthermore, your
patch would leak in case of allocation failure.
- Andreas
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